Williams Rem 700 Floorplate

I'm able to get a McM inletted for a Williams Floorplate ("new style" as I understand). It's a bit unfair to ask Williams directly as I don't intend to buy their product, so the question is whether anyone here knows if the standard BDL bottom metal will fit? From the Williams website the new bottom metal is supposed to be "drop in" for a BDL, which my (maybe overly simplified) analysis tells me should be both ways around.